Housing affordability varies dramatically depending on where you live.A new Realtor.com report released this week graded the nation's 100 largest metro areas based on housing affordability and the pace of new home construction.Joel Berner, senior economist at Realtor.com, told FOX Business that the rankings were designed to capture the current state of each housing market, as well as its long-term trajectory."It's really a balanced look at the present and the future for how things are affordable now and how they might be affordable in years to come," Berner said.THE US CITIES WHERE HOME PRICES...